When S0₂ gas is passed through saturated solution of H₂S, the following reaction occurs :

In this reaction, which substance is oxidized and which one is reduced?

(a) Which substance is reduced?

(b) Which substance is oxidised?

(a) The addition of oxygen to a substance is called ......... whereas removal of oxygen is called.........

(b) The addition of hydrogen to a substance is called ......... whereas removal of hydrogen is called.........

(c) Anti-oxidants are often added to fat containing foods to prevent ..........due to oxidation.

(i) the substance oxidised, and

(ii) the substance reduced: